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Trivia: On the DVD commentary, Peter Davison remarks that when Christopher Gable whacked him across the face with the back of his hand, it actually hurt quite a bit, even though they'd discussed it beforehand. Davison believes that Gable couldn't see him properly with his mask on, although a more likely explanation is that Gable got too carried away.

Deliberate mistake: When the recon team head out of the base they encounter a robot. But it is a probe droid, distinguishable by the lack of a cannon on its right arm. The only probe droid that the lab sent out self-destructed back in the 1970s, the rest were all sterilisation units.

Plot hole: When the first sterilisation unit encounters Nicholas in the desert, he commands it to 'cease operation' and it becomes harmless. There was no reason why he couldn't have used the same command later on in the movie when he encountered deadly robots, particularly when one was teleported to the lab.

Plot hole: When Nicholas crosses the timeline into the other 'futuristic' world he becomes Nicholas the tech soldier. Yet when he crosses back into the first timeline (where he's a scientist) he does not adopt the scientist's body.

Plot hole: When the team are trapped in the lab corridor, Nicholas uses the code 90258 to stop the countdown. Trouble is, in that timeline Nicholas was a tech soldier, not a scientist so the code would have been set by someone else, and not by him. His code should never have worked.

Continuity mistake: When the first sterilisation unit is hunting for prey in the desert, it fires a few shells towards the destroyed caravan. Yet we never hear explosions or see any fireballs in the next shot. It also appears that the robot was firing at nothing.

Continuity mistake: When Gunney fires the large cannon at the first sterilisation unit, from the frontal view it is obvious that the explosion has fallen well short of the robot. Yet from the side, it appears to have been a direct hit.

Continuity mistake: When Natasha is shot by the robot, the shot travels right through her, like a normal bullet would. Yet in every other scene when the robots use their pulse cannons, including when Rasheed dies, the shot always causes an explosion. With Natasha, no explosion was seen or heard.

Continuity mistake: When Devlin is thrown out the pub window, the E-Boat captain is standing behind Neustadt's right shoulder. In the next shot, he is over to his left. Radl is also now gripping the railing.

Continuity mistake: When the sterilisation unit finds Nicholas in the desert, when he stands up and the robot is looking at him, there is a lot of debris around him. When he says 'cease operation' the debris disappears. The rock face behind him changes position as well.

Revealing mistake: When the team are heading back to base and we see the skyline for the first time, it's obviously a painting projected onto a blue screen. You can see the line where the set and the screen meet. There is also a white line running across the bottom of the screen.

Continuity mistake: During the early train yard scene, the weather changes between light, heavy, and no snowfall, depending on the shot. This is especially noticeable when the SS chase the Jewish girl.

Continuity mistake: When Steiner lifts up the Jewish girl, if you look closely, you can see the rear end of the train about 20 metres away. Yet somehow Steiner has time to ask her name, wish her good luck, set her down on one of the carriages and watch her get shot before the train fully passes him. The departing train also conveniently slows down for him to drop the girl.

Plot hole: When the general approaches Steiner in the train yard, he says 'you didn't seem so discriminating a moment ago' implying that he saw Steiner help the Jewish girl onto the train. But this is impossible, as there was a moving train between himself and Steiner when the incident happened. For all he knew Steiner could be blameless.

Deliberate mistake: When Adam kills himself and Hector at the end, the explosion sends a lot of water and parts of Hector into the air. But there is no sign of Adam's blood, body parts or clothing, despite the fact that the bomb was strapped to him.

Continuity mistake: When Adam switches on the monitor to view Hector trapped in the lab, Hector is seen ripping a piece of the door off. Adam then asks Benson about emergency procedure. When the shot cuts back to the monitor, Hector is ripping the same piece off the door again; it's the same footage. Also, when the three humans force their way into the lab afterwards, the damage done to the door is not the same as they viewed on the monitor.

Continuity mistake: When Fletcher takes his son to the office, they step out the lift and a woman in a purple suit is seen walking to the left. In the next shot, the same woman is walking to the right.